.site-header {
  background: #1e40af;
  color: white;
  padding: 15px;
  text-align: center;
}

.site-header nav a {
  color: white;
  margin: 0 10px;
  text-decoration: none;
  font-weight: bold;
}

.site-header nav a:hover {
  text-decoration: underline;
}

.exam-section {
  max-width: 900px;
  margin: 40px auto;
  padding: 20px;
}

.exam-card {
  background: white;
  padding: 20px;
  margin-bottom: 20px;
  border-radius: 10px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

.site-footer {
  text-align: center;
  padding: 15px;
  background: #f1f5f9;
  margin-top: 40px;
}